Colored icons in the browser address bar, indicate if a websites can be trusted,
by relying on digitally signed information provided by the owner of the websites
domain, without involvment of third-parties, like certificate authorities,
browser vendors et al.

HTTPS Everywhere automatically
connects you with HTTPS instead of HTTP on all websites that are known to
support HTTPS as well as HTTP. This includes connections to third-party sites
which may provide embedded content on a visited website.

Perspectives is a new approach to helping computers communicate securely on the
Internet, based on a research project of the Computer Science Department at
Carnegie Mellon University. With Perspectives, public “network notary” servers
regularly monitor the TLS certificates used by 100,000s+ websites to help your
browser detect “man-in-the-middle” attacks without relying on certificate
authorities.

Decentraleyes
protects you against tracking through “free”, centralized, content delivery. It
prevents a lot of requests from reaching networks like Google Hosted Libraries,
and serves local files to keep sites from breaking. Complements regular content
blockers.

The Self-Destructing Cookies
extension gets rid of a site’s cookies and LocalStorage as soon as you close its
tabs. This way it protects your browser from trackers and zombie-cookies.
Trustworthy services can be whitelisted.

DuckDuckGo is an Internet search engine that
emphasizes protecting searchers privacy and avoiding the filter bubble
of personalized search results. DuckDuckGo gets its results from over one
hundred different sources.